Ultra-high linearized optical modulator

The invented modulator provides ultra-high linearity (SFDR=147 dB-Hz), high tolerance, low loss, simple architecture, and low cost. It is based on unique combination of phase-modulator (PM) and ring resonator (RR) that are coupled to the arm(s) of standard Mach-Zehnder interferometer (MZI) configuration. It comprises of input port to receive optical signal 1, optical power separating means 2, interferometer arm length paths 3 & 4, bias controller mean 5, PM 6, RR 7 with coupler 17 having coefficient δ, optical power combining means 8, RF power splitting means 9, RF power source 10, and optical output signal 15. Both PM 6 and RR 7 are driven by same RF source 10 whose output power is divided into two parts with a split ratio of F:(1-F). The role of RR 7 is to provide the necessary non-linear phase-correction. It operates under non-resonance condition to avoid bandwidth narrowing. The dual modulation of PM 6 and RR 7 is an important factor in this invention.